For drilling machines



2 Sheets-Sheet l.

(No Model.)

W? PORTABLE AND VARIABLE SHAFTING FOR DRILLING MACHINES.

Patented Jan. 9, 1894.

wAsmNaToN. n. c.

(No Model.) 2 Sheets-Sheet 2.

W. ROSS. PORTABLE AND VARIABLE SHAFTING PoR DRILLING MACHINES. N0.l 512,486.

PatentedJan. 9, 1894.

TME lumouAL Lrmomurnma couPANY.

WAMINGTON. o. c,

UNITED STATES Fries.

ATENT -WILLlAll/LROSS, OB MONTREAL, CANADA.

SPECIFICATION forming part of Letters Patent No. 512,486, dated January 9, 1894.

Application filed February 14, 1893. Serial No. 462,351. (No model.)

To if/ZZ whom it may concern.-

Be it known that I, WILLIAM Ross, of the city of Montreal, in the district of Montreal and Province of Quebec, Canada, have invented certain new and useful Improvements in Portable and Variable Drills and Shafting; and I do hereby declare that the following is a full, clear, and exact description of the same.

This invention relates to portable drills and shafting or mechanism for conveying the ro- A tary motion of a main driving shaft or other rotatory part in a number of different directions from a single point of connection with the main shaft to a working tool such as a drill piece, reamer orthe like secured to the opposite and free end of the mechanism and which can be applied or held to work at various angles such as required during the construction of large metal boilers, girders, dto. The object of the invention is to secure first a greater latitude of free movement for the device; secondly, the automatic shortening and lengthening of the parts so as to render the mechanism more compact and convenient to handle particularly at times when the work is situated close to the point of connection with the man1 shaft, and thirdiy to anew of the stoppage of the tool when desired without necessarily stopping the main shaft also.

The invention may be said to consist first in a free sliding or movable connection of the portable shaft mechanism proper with the main shaft; secondly, in theconstruction of the portable shaft mechanism itself this comprising in the main a rotatory guide section having in turn a universaljoint connection with the part having a movable connection with the main shaft and carrying an extension spindle or bar adapted to project for some distance from the free end of said guide and be rotated with it or be drawn within such guide for some distance so as to shorten the length of the mechanism as a Whole without however interfering with its rotation or that of the tool, and thirdly in a special construction of the outer end of the extension spindle and of its connections with the guide whereby upon moving it for an extreme 'distance into the guide its rotation with same can be prevented and the tool held stationary if so desired for any purpose.

For full comprehension however of the invention, reference must be hadto the anneked drawings forming a part of this specification in which like symbols indicate corresponding parts and wherein- Figure 1 is a side elevation of the shafting partly in section; Fig. 2 an elevation of same taken at right angles to Fig. 1 and also partly in section; Figs. 3, 4 and 5 being transverse sections respectively on tlie lines a: so; {L/ y; and z z,.Fig. 1.

ct is the usual main shafting carried by hangers a a and in this case having a longitudinal groove a2.

b b are two bevel gear wheels mounted loosely on the shaft ci and in reverse positions so that their toothed surfaces will face each other and each be in mesh with a third bevel gear wheel c mounted on the upper end of a second shaft or spindle c suspended vertically at right angles below the main shaft a in a forked hanger cl the forked ends d CZ of which are perforated to it loosely on the shaft a at a short distance in the rear of the respective gear wheels b h.

On the shaft o, between the respective gear wheelsb b and the forked ends d cl of the hangers d, clutch blocks or collars e e are mounted and provided with feathers f to fit the groove 0.2 of the shaft a as well as having their surfaces which face the gear wheels b b clutch-faced or toothed to engage with the like surfaces of' the rear faces of the gear Wheels b b in any of the usual ways, bellcrank levers g g', pivoted at h to the hanger CZ, having upwardly projecting ends or arms connected respectively with the collars e e and also connected together by bar e2 and their opposite or horizontal projecting ends adapted to be operated as may be desired by the operator for the purposes hereinafter set forth.

The vertically hanging shaft c which is suitably journaled in the hanger d extends for a short distance below the saine and terminates in a thin neck c2 on the end of which is the ball pait of a ball-link-and-fork-joint of the usual type the several parts of whichV including that just mentioned are lettered respectively 7c 7c 7a2.

The body of the fork portion 7a2 has asquare aperture formed in it to receive the square neckpiece Z projecting from the upper blocked IOO end of a length of tubing L which forms a guide for a countorbalance weight m of tubulai.` form suspended by a cord m over a grooved pulley n axially mounted at the upper end of such tube. The cord fm is looped at one end around a pulley m2 secured on the weight while the opposite ends are attached to the eye p of a swiveliug connection p with which is connected the upper end of a square bar q, free to work through the weight fm, extending down and outward through a square aperture q in the lower blocked end of the tube L, the lower end of such bar being diminished in size and made circular in section as shown at o' for a purpose hereinafter described, and further extended to carry a collar i" and a second ball-link-and-fork-joint the parts of which are lettered respectively s S s2 s3 from which ball part S a holder t eX- tends and terminates in a squared socket 1." adapted to have removably secured init any desired tool such as a reamer, drill or the like, the first named being shown in place.

The operation of my invention is as followsz--By pulling downward the horizontal arm of the pivoted lever g, the clutch e, keyed on shaft a is thrown into contact with the bevel gear l) which, through gear c and balllink-and-fork-joint 7s k 7a2 imparts a rotary motion to the guide tube L and when the square portion of the bar q is projected through the aperture q in the lower end of the guide it is also rotated and with it of course the remaining parts including the tool, but when the bar is drawn sufficiently within the guide to locate its circular portion o' in the aperture q the tube rotates around it without disturbing it, its swiveling connection p preventing the cord in from being twisted. Whenever it is desired to bring the tool into action the bar q is drawn outward against the inward pull of the counterbalance weight by means of the handle to mounted loosely' in a groove on the holder 25 so that the holder can be rotated while the handle can be held and used to set the position of the tool. lVhen the tool is not required it is automatically drawn up into its normal position by the counter weight m the extension bar entering the guide till its circular portion o' enters thc square hole q in the lower stopped ends of the guide as before mentioned. The tube thereby loses its hold on same, allowing the bar to become stationary and the tube free to rotate around it. To reverse the direction of the rotation of the drill the lever g is operated similarly to the one g and throws clutch e out of contact with bevel gear b by means of bar e2 and simultaneously the clutch e into contact with bevel gear b which consequently reverses the direction of rotation of the gear wheel c. To stop the drill altogether without stopping the main shafting it is only necessary to draw down whatever horizontal arm of the levers is above its normal or horizontal position to such normal or horizontal position, as shown in Fig. l, and both clutches will be thrown out of contact with their bevel gears, when, as it will be readily seen, the portable shafting and its operating gearswillbecomestationary. Asalltheparts mounted on the main driving shaft are mounted loosely so far as movement longitudinally of such shaft is concerned the apparatus as a whole can be moved backward and forward along said shaft between the hangers thereby giving it, together with its universal joint and telescopic connections, an extensive working area. Of course it is not necessary that the reversing gear and clutch mechanism should be provided in every ease, as a single bevel gear on the main shaft without any clutch mechanism can be used although this necessitates the continuous rotation of the rotary guide.

What l claim is as follows:

l. The combination with a main driving shaft invariable as to position; of a portable shafting with a free sliding tool-carrying extension therefrom, a free pivotal sleeved hanger and devices connecting said hanger with said main driving shaft whereby it may be freely rotated about same.

2. The combination with a main driving shaft invariable as to position,of a portable shafting with a free sliding tool-carrying-extension therefrom, and a free sliding sleeved hanger connection between said main driving shaft and said portable shafting whereby the latter is variable in position longitudinally of same, by direct pulling upon it in line with said main shaft.

3. The combination with a main horizontal driving shaft invariable as to position,of a portable shafting with a free sliding toolcarrying-extension therefrom and suspended from said driving shaft by a sleeved hanger free to rotate about and slide along same unchecked and freely variable in position relatively to same, by direct pulling upon it in line with said main shaft or laterally thereto.

4. The combination with a main driving shaft, of one or more bevel gear wheels b, b', mounted thereon; a spindle e arranged at right angles to said main driving shaft; a bevel gear wheel on one end of said spindle adapted to intermesh with the gear wheels on said shaft; a rotatable guide with universal joint connection between one end of same and said spindle; and a tool carrying extension from the opposite end of said guide adjustable, without rotation, relatively to, and

IOO

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adapted to be rotated by such guide, as set forth.

5. In a portable shafting the combination with a rotatable guide and means for rotating same; of a tool carrying extension movable in and out of said guide and being for the greater part of its length of an angular cross section corresponding to that of an aperture in the end of said guide, through which it works and whereby it is rotated, and of a circular cross section toward its outermost end for the purpose set forth.

6. In a portable shafting Ithe combination with a rotatable guide and means for rotating same; of a tubular countcrbalance weight, suspending cord and pulley, and a tool carrying extension movable in and-out of said guide and connected by a swiveling attachment with one end of said suspending cord as set forth.

7. The combination with a main horizontal driving shaft invariable as to position, of a por-table shafting comprising a hanger having a pivotal and sliding connection with said main shaft; one or more bevel gears mounted upon and adapted to slide on and be rotated by said shaft; a vertical spindle carried by said hanger and havinga bevel gear on its upper end adapted to mesh with said bevel gear or gears on said main shaft; a rotary guide, a ball-link-and-fork-joint connection between said guide and spindle, a tubular counterbalance weight suspended within or without said rotatory guide; a rod extension attached to one end of the suspending cord for said weight and a tool holder at the en d of said rod extension with ball-link-andfork joint connection between it and said extension,the said rod extension being square in cross section and adapted to project through a square aperture in the lower end of said rotatory guide as set fort-h.

8. In a portable shafting the combination with a main horizontal driving shaft invariable as to position a sleeved hanger having a pivotal and sliding connection with said main shaft, a rotatable guide and means for rotating same,-of a suspended sliding tool-carryin g-extension, adjustable longitudinally without rotation relatively to and adapted to be rotated by said guide for the purposes set forth.

WILLIAM ROSS. Witnesses:

YOLDMN. EVANS, FRED. J. SEARS. 

